ignition ACURA CSX 2006 Service Repair Manual

Security Alarm System
Key-in Reminder
Key Interlock (A/T)
Answer Back Response Operation
Wiper/Washer
Collision Detection Signal (CDS)
InputOutput
Input Output
Input Output
Input Output
Input Output
Input Output
22-87
The MICU controls the lighting system and horn based upon B-CAN signals and input signals from the each switch.
MICU IG1 power supply Ignition key switch
Audio switch
Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Driver’s door key cylinder switch (UNLOCK)
Driver’s door lock knob switch (UNLOCK)
Front passenger’s door lock knob switch (UNLOCK)
Left rear door lock knob switch (UNLOCK)
Right rear door lock knob switch (UNLOCK)
Hood switch Horn
Headlights
Parking lights
Side marker lights
License plate lights
Taillights
B-CAN Keyless LOCK signal Door lock signal
The MICU controls the door lock actuators based upon ignition key switch, the driver’s door switch, and driver’s door lock knob switch signals. MICU Ignition key switch Driver’s door switch
Driver’s door lock knob switch Door lock actuator (LOCK/UNLOCK)
Driver’s door lock actuator (UNLOCK)
The MICU controls the key interlock solenoid based upon IG1, transmission range switch, and park-pin switch signals. MICU Ignition switch ACC Transmission range switch (P position)
Park-pin switch Key interlock solenoid
The MICU controls the lighting system and horn based upon B-CAN signals. B-CAN Answer back signals (headlight low, horn, parking lights) Horn Headlights
Parking lights
Side marker lights
License plate lights
Taillights
The MICU controls the wiper motor and the washer motor based upon IG1 and wiper/washer switch signals. MICU IG1 power supply Wiperswitch(INTandLO)
Wiper switch (LO and HI)
Wiper switch (MIST)
Washer switch
Wiper intermittent speed Wiper motor
Washer motor
The MICU controls the door lock actuators based upon IG1 and B-CAN signals. MICU IG1 power supply Door lock (LOCK/UNLOCK)
B-CAN SRS signal (front, side and rear) Impact sensors
(cont’d)
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System MenuData List Data List Indication
22-89
LightingDriver’s Door Switch OFF/ON
Hazard Switch OFF/ON
Headlight Switch (OFF) OFF/ON
Headlight Switch (PARKING) OFF/ON
Headlight Switch (HEADLIGHT) OFF/ON
Headlight Switch (High Beam) OFF/ON
Headlight Switch (PASSING) OFF/ON
Turn Signal Switch (LEFT) OFF/ON
Turn Signal Switch (RIGHT) OFF/ON
Fog Light Switch OFF/ON
Ignition Key Cylinder Light Command OFF/ON
Interior Light Command OFF/ON
Left Turn Signal Command OFF/ON
Right Turn Signal Command OFF/ON
Headlight Command OFF/ON
Headlight High Beam Command OFF/ON
Parking Light Command OFF/ON
Fog Light Command OFF/ON
DRL Command OFF/ON
Door Locks Driver’s Door Switch OFF/ON
Front Passenger’s Door Switch OFF/ON
Driver’s Rear Door Switch OFF/ON
Passenger’s Rear Door Switch OFF/ON
Front Passenger’s Door Lock Sw. (LOCK) OFF/ON
Front Passenger’s Door Lock Sw. (UNLOCK) OFF/ON
Front Passenger’s Door Lock Knob Sw. (UNLOCK) OFF/ON
Driver’s Rear Door Lock Knob Switch (UNLOCK) OFF/ON
Passenger’s Rear Door Lock Knob Sw. (UNLOCK) OFF/ON
Driver’s Door Key Cylinder Switch (LOCK) OFF/ON
Driver’s Door Key Cylinder Switch (UNLOCK) OFF/ON
Driver’s Door Lock Switch (LOCK) OFF/ON
Driver’s Door Lock Switch (UNLOCK) OFF/ON
Driver’s Door Lock Knob Switch (LOCK) OFF/ON
Driver’s Door Lock Knob Switch (UNLOCK) OFF/ON
Door LOCK Command OFF/ON
Door UNLOCK Command OFF/ON
Driver’s Door UNLOCK Command OFF/ON
(cont’d)
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System MenuData List Data List Indication
22-91
SecurityIgnition Key Cylinder Switch OFF/ON
Driver’s Door Switch OFF/ON
Front Passenger’s Door Switch OFF/ON
Driver’s Rear Door Switch OFF/ON
Passenger’s Rear Door Switch OFF/ON
Trunk Lid/Tailgate Switch OFF/ON
Front Passenger’s Door Lock Sw. (LOCK) OFF/ON
Front Passenger’s Door Lock Sw. (UNLOCK) OFF/ON
Front Passenger’s Door Lock Knob Sw. (UNLOCK) OFF/ON
Driver’s Rear Door Lock Knob Switch (UNLOCK) OFF/ON
Passenger’s Rear Door Lock Knob Sw. (UNLOCK) OFF/ON
Trunk Key Cylinder (UNLOCK) OFF/ON
Radio Switch OFF/ON
Hazard Switch OFF/ON
Hood Switch OFF/ON
Driver’s Door Key Cylinder Switch (LOCK) OFF/ON
Driver’s Door Key Cylinder Switch (UNLOCK) OFF/ON
Driver’s Door Look Switch (LOCK) OFF/ON
Driver’s Door Look Switch (UNLOCK) OFF/ON
Driver’s Door Look Knob Switch (LOCK) OFF/ON
Driver’s Door Look Knob Switch (UNLOCK) OFF/ON
Door LOCK Command OFF/ON
Door UNLOCK Command OFF/ON
Driver’s Door UNLOCK Command OFF/ON
Security Hazard Signal Command OFF/ON
Headlight Command OFF/ON
Headlight High Beam Command OFF/ON
Parking Light Command OFF/ON
(cont’d)
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22-93
Troubleshooting - B-CAN System Diagnosis Test Mode A
A
Check the ECM/PCM for DTCs and troubleshoot ECM/
PCM (see page 11-3) or F-CAN loss of communication
errors first, then do this diagnosis if the symptom is
relatedtotheB-CANsystem.
NOTE: If the HDS is not available, do the Test Mode 1 and Test Mode 2 (see page 22-97).
 Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting
procedures.
1. Compare the symptom with this list of B-CAN related systems:
 Gauge control module
 Exterior lights
 Turn signals
 Entry light control
 Interior lights
 Door-open and trunk-open indicators
 Horns (security and panic)
 Chimes (key-in, seat belt, lights-on, and parking brake)
 Power window/moonroof timer
 Wiper/washer
Security
 Keyless entry
 Power door locks
Keyinterlock
 Dash light brightness control
Go to step 2.
Go to the system troubleshooting for the
system with the symptom. 2. Connect the HDS to the data link connector (A),
then turn the ignition switch to ON (II).
3. From the BODY ELECTRICAL menu, select UNIT INFORMATION, and then select CONNECTED UNIT
listed to see if the following control units are
communicating with the HDS.
MICU
 Gauge control module
 Immobilizer-keyless control unit
 Climate control unit
 HandsFreeLink control unit
NOTE:  If one or more of the units are not communicating with the HDS, DETECT will be
displayed.
 If the unit is not communicating or the vehicle is not equipped, ‘‘Not Available’’ will be displayed.
Go to step 4.
If any of the control units are not
communicating, go to B-CAN System Diagnosis
Test Mode B (see page 22-94). If all units are not
communicating or only the MICU is communicating,
go to DTC B1000 troubleshooting (see page 22-102).
(cont’d)
Is the symptom related to the B-CAN system? Ar e al l cont r ol uni t s communi cat i ng w i t h t he H DS?
08/08/21 14:24:59 61SNR030_220_0095
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22-95
Troubleshooting - B-CAN System Diagnosis Test Mode C
Do this diagnosis if a component that is controlled by
the B-CAN system does not stop or turn off.
NOTE:
 If the component does not turn on, go to B-CAN System Diagnosis Test Mode D (see page 22-96).
 See the B-CAN system unit input/output index for a list of input and output devices and the control units
that monitor the input and controls the output devices
(see page 22-88).
 Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting
procedures.
1. Check for DTCs by selecting the TEST MODE menu from the HDS.
Go to B-CAN System Diagnosis Test Mode A
(see page 22-93).
Go to step 2.
2. Turn off the switch that controls the malfunctioning component.
3. Select DATA LIST from the TEST MODE menu, and check the input of the switch that controls the
component.
Go to step 4.
Go to step 6.
4. In the DATA LIST, check the output signal of the malfunctioning component.
Go to step 5.
Replace the control unit that controls the
device that will not turn OFF. 5. Check the relay, if applicable, then check for a short
in the wire between the relay and the component,
the relay and control unit, or the component and
control unit.
Replace the control unit that controls the
component that will not turn OFF.
Replace the relay or repair the wire
harness.
6. Check the switch, then check for a short in the wire between the switch and the control unit that
monitors the switch.
Replace the control unit that monitors the
switch.
Replace the switch or repair the wire
harness.
Are any DTCs indicated?
Does the HDS indicate the switch is OFF?I s t he out put si gnal OF F ? Ar e t he r el ay and t he w i r e har ness OK ?
Ar e t he sw i t ch and w i r e har ness OK ?
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22-96
Multiplex Integrated Control System
Troubleshooting - B-CAN System Diagnosis Test Mode D
Do this diagnosis if a component that is controlled by
the B-CAN system does not run or come on.
NOTE:
 If the component does not turn off or stop, go to B- CAN System Diagnosis Test Mode C (see page 22-95).
 See the B-CAN system unit input/output index for a list of input and output devices and the control units
that monitor the inputs and control the output devices
(see page 22-88).
 Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting
procedures.
1. Check the fuse of the malfunctioning output device.
Go to step 2.
Replace the fuse and recheck.
2. Check for DTCs by selecting the TEST MODE menu from the HDS.
Go to B-CAN System Diagnosis Test Mode A
(see page 22-93).
Go to step 3.
3. Turn ON the switch that controls the malfunctioning component.
4. Select DATA LIST from the TEST MODE menu, and check output signal for the malfunctioning
component.
Go to step 5.
Go to step 9.
5. Check the relay and ground, then check for an open or a short in the circuit for the malfunctioning
component.
Go to step 6.
Replace the relay or repair the wire circuit. 6. Do the function test for the malfunctioning
component.
Go to step 7.
Replace the component.
7. With the malfunctioning output device connected, connect a voltmeter between the malfunctioning
output device and body ground on the wire that the
control unit uses to control the output device circuit.
8. Select MISC. TEST from the TEST MODE menu, and do the forced operation test of the
malfunctioning component.
Inspect the ground for the component. If OK,
replace the component.
Replace the control unit that controls the
malfunctioning component.
9. Select DATA LIST from the TEST MODE menu, and make sure the switch signal input for the
malfunctioning system indicates a change when
operated.
Replace the control unit that controls the
malfunctioning component.
Go to step 10.
10. Check the switch and its ground (if applicable), then check for an open or a short in the wire between
the switch and the control unit that monitors it.
Replace the control unit that monitors the
switch.
Replace the switch or repair the wire
harness.
IsthefuseOK?
Ar e any DT Cs i nd i cat ed ?
Is t her e an out put si gnal ?Ar e t he r el ay and ci r cui t OK ? Does t he out put d ev i ce pass t he f unct i on t est ?
I s t her e a change i n v ol t age ( 12 V t o 0 V or0V to12V)?
Does the switch input indicate ON when the switchis ON?
I s t he sw i t ch and t he w i r e har ness OK ?
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Test Mode 1
Test Mode 2
22-97
Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2
(without the HDS)
A
(07WAZ-001010A)B
MPCS (MCIC) service connector 07WAZ-001010A
Check the ECM/PCM for DTCs and troubleshoot ECM/
PCM (see page 11-3) or F-CAN loss of communication
errors first, then do this diagnosis if the HDS is not
available.
1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 10 (7.5 A) fuse in the under-
dash fuse/relay box.
Go to step 2.
Find and repair the cause of the blown fuse.
2. Remove the left kick panel (see page 20-66).
3. Turn the ignition switch to ON (II), and move the ceiling light switch to the middle ( door) position.
4. Connect the MPCS service connector (A) to the MCIC socket (B) in the under-dash fuse/relay box.
5. Wait 5 seconds, and watch the ce iling light. When
the ceiling light flashes quickly once, and then goes
off the system is in Test Mode 1. 6. Check for B-CAN DTCs indicated by the gauge
control module (tach) odometer/trip meter display
while still in Test Mode 1. Push the SEL/RESET
switch button to display the next code. After you
get to the last code, the display shows END. If no
DTCs are stored, the display will read NO.
Go to step 7.
Go to step 10.
7. Record all DTCs and sort them.
8. Troubleshoot the DTCs in this order:  Battery voltage DTCs
 Internal error DTCs
 Loss of communication DTCs (begin with thelowest number first; for example, if B1008 and
B1011 are retrieved, troubleshoot B 1008 first)
 Signal error DTCs
9. Clear the DTCs by pressing and holding the SEL/ RESET switch button for about 10 seconds. You will
hear a beep to confirm the codes have been cleared.
Operate the devices that failed, and recheck for
codes.
10. Remove the MPCS service connector from the under-dash fuse/relay box socket for
5 10 seconds, then re-insert it to enter Mode 2.
When the system enters Mode 2, the ceiling light
will flash two times quickly and then go off.
NOTE: If the MPCS service connector is
disconnected for too short or too long of a time, or
the ignition switch is turned to LOCK (0), the
system will return to Test Mode 1.
11. The following tables list the circuits that can be checked in Test Mode 2. Operate the switch that is
most closely related to the problem. If the circuit is
OK, the ceiling light will blink once. If the circuit is
faulty, there will be no indication.
(cont’d)
Ar e t he f uses OK ? Are any DTCs indicated?
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Item
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22-98Multiplex Integrated Control System
Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2
(without the HDS) (cont’d)
Driver’s door lock switch (UNLOCK)
Driver’s door lock switch (LOCK)
Driver’s door lock knob switch (UNLOCK)
Driver’s door lock knob switch (LOCK)
Driver’s door key cylinder switch (UNLOCK)
Driver’s door key cylinder switch (LOCK)
Front passenger’s door lock switch (UNLOCK)
Front passenger’s door lock switch (LOCK)
Front passenger’s door lock knob switch
(UNLOCK)
Left rear door lock knob switch (UNLOCK)
Right rear door lock knob switch (UNLOCK)
Driver’s door switch (OPEN)
Front passenger’s door switch (OPEN)
Left rear door switch (OPEN)
Right rear door switch (OPEN)
Trunk lid latch switch (OPEN)
Audio switch
Windshield wiper HI/LO switch
Windshield wiper INT/LO switch
Windshield wiper MIST switch
Windshield washer switch (ON)
Windshield wiper intermittent dwell time
controller
Windshield wiper motor park switch
Turn signal switch (LEFT)
Turn signal switch (RIGHT)
Hazard warning switch (ON)
Headlight switch (ON)
Headlight switch (OFF)
Lighting switch (ON)
Dimmer switch (ON)
Passing switch (ON)
Fog light switch (ON)
Hood switch (OPEN)
A/C pressure switch/thermal protector
Transmission range switch (P)
Ignition key cylinder switch
Brake switch (ON)
: A second key is necessary to check the key cylinder inputs.
Be sure to rotate the key cylinder switch two
times to each position (lock and lock, unlock
and unlock) to ensure the door lock knob
switch is in the appropriate position. Go to function and input test for the system
related to the failure.
Repair the open, short, or replace the faulty
switch.
Does the ceiling light work properly in all switch posi t i ons?
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22-99
Sleep and Wake-up Mode Test
1. Shift to the sleep mode:Turn the ignition switch to LOCK (0), and remove the key. If the MICU receives no signals from the inputs listed
below, it will go into sleep mode in less than 40 seconds.
Driver’s door lock switch (LOCK or UNLOCK)
Driver’s door key cylinder switch (LOCK or UNLOCK)
Front passenger’s door lock switch (LOCK or UNLOCK)
Trunk lid latch switch (Trunk lid closed)
Hazard warning switch (OFF)
2. Confirm the sleep mode: Measure the frequency on the B-CAN communication line (PNK wire); there should be 0 Hz when the system is in
the sleep mode. Check the parasitic draw at the battery while shifting into the sleep mode; the amperage should
change from about 200 mA to less than 35 mA.
3. Shift to the wake up mode: When the ignition switch is turned to ON (II), the MICU, gauge control module, immob ilizer-keyless control unit,
and ECM/PCM wake up at the same time without ‘‘talking’’ to each other through the communication lines. When
any switch in the multiplex integrated control system is turned on, it wakes up its related control unit which, in
turn, wakes up the other units. After confirming the sleep mode, look in the following table for the switch most
related to the problem. Operate that switch and see if its control unit wakes up.
NOTE: If any control unit is faulty and will not wake up, several circuits in the system will malfunction at the same
time. In the table below, the control unit is followed by a list of the switches and input signals that can wake it up.
Door switches (door open)
Driver’s door lock switch (LOCK or UNLOCK)
Driver’s door lock knob switch (LOCK or UNLOCK)
Driver’s door key cylinder switch (LOCK or UNLOCK)
Front passenger’s door lock switch (LOCK or UNLOCK)
Front passenger’s door lock knob switch (LOCK or UNLOCK)
Left rear door lock knob switch
Right rear door lock knob switch
Trunk lid latch switch (Trunk lid open)
Hood switch (with security) (hood open)
Hazard warning switch (ON)
Combination light switch (Parking, Headlight, Dimmer, Passing ON)
Ignition key switch (key inserted)
08/08/21 14:25:00 61SNR030_220_0101
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22-100Multiplex Integrated Control System
Circuit Diagram
K5
G3 Q1 Q9
D2
LT BLU RED
No. 22 (7.5 A)
BLK
G501 T34
G602E6
BLK SG
G601E33
BLK
PG
H2
H1 Q6
B-CAN
MICU
G401 PNK
K4 G2
UNDER-DASH FUSE/RELAY BOX
UNDER-HOOD FUSE/RELAY BOX
WHTBRN
No. 10 (7.5 A)
BLK F20
No. 2 (IG) (50 A)
ORNIG1
BAT
BLU
WHT
No. 23 (10 A)
BATTERY
IGNITION SWITCH
No. 1 (BAT) (100 A)
MICU
SERVICE
CHECK
CONNECTOR IG1 HOT in ON (II)
and START (III)
CEILING
LIGHT
H1
D4 D2
LT BLU K-LINEQ8





 AUDIO UNIT*6
NAVIGATION
UNIT*5
DATA LINK
CONNECTOR
IMMOBILIZER-
KEYLESS
CONTROL UNIT
SRS UNIT
TPMS CONTROL
UNIT*3
ABS
MODULATOR-
CONTROL UNIT *1 EPS CONTROL
UNIT
VSA MODULATOR-
CONTROL UNIT *2 IG1
LT BLU
LT BLU F14
F28VBU
16
G501 BLK
1
18
PNK
No. 35 (7.5 A)
FUSE
(UNDER-DASH
FUSE/
RELAY BOX)
No. 23 (10 A)
FUSE
(UNDER-DASH
FUSE/
RELAY BOX)
15
PUR
WHT
HANDSFREELINK
CONTROL UNIT *4
(B-CAN)
PNK
PNK
(B-CAN)
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